2.5 Litre of 1 M NaOH solution mixed with another 3 litre of 0.5 M NaOH solution.

2.5 Litre of 1 M NaOH solution mixed with another 3 litre of 0.5 M NaOH solution. Then find out molarity of resultant solution

Options

(a) 0.80 M
(b) 1.0 M
(c) 0.73 M
(d) 0.50 M

Correct Answer:

0.73 M

Explanation:

Molecular weight of NaOH = 40.
2.5 litre of 1 M NaOH solution contain 40⨯ 2.5 g of NaOH .
3 litre of 0.5 M NaOH solution contain 40 ⨯ 0.5⨯ 3 g of NaOH.
If this two solutions are mixed, the volume of the resultant solution = (2.5 + 3) lit = 5.5 litre.
5.5 litre of the resultant solution contain 40(2.5 + 1.5) g of NaOH.
1 litre of the resultant solution contain
40⨯4/5.5 g of NaOH = 40⨯4/5.5⨯40 mole of NaOH.
The molarity of the resultant solution = 0.727 ≈ 0.73 mol/L.

admin:

Related Questions

  1. 2-Acetoxy benzoic acid is used as an
  2. All the s-block elements of the periodic table are placed in the groups….
  3. The crystal structure of solid Mn(II) oxide is
  4. In the periodic table, the element with atomic number 16 will be placed
  5. Which of the following processess are not used for the purification of solid